EP0028651B1 - Cutting tools having compound cutting faces - Google Patents

Cutting tools having compound cutting faces Download PDF

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Publication number
EP0028651B1
EP0028651B1 EP80901205A EP80901205A EP0028651B1 EP 0028651 B1 EP0028651 B1 EP 0028651B1 EP 80901205 A EP80901205 A EP 80901205A EP 80901205 A EP80901205 A EP 80901205A EP 0028651 B1 EP0028651 B1 EP 0028651B1
Authority
EP
European Patent Office
Prior art keywords
cutting
tool
angle
face
plane
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP80901205A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0028651A1 (en
EP0028651A4 (en
Inventor
Arthur B. Ryan
Gilmore A. Spear
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gleason Works
Original Assignee
Gleason Works
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gleason Works filed Critical Gleason Works
Publication of EP0028651A1 publication Critical patent/EP0028651A1/en
Publication of EP0028651A4 publication Critical patent/EP0028651A4/en
Application granted granted Critical
Publication of EP0028651B1 publication Critical patent/EP0028651B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23F—MAKING GEARS OR TOOTHED RACKS
    • B23F21/00—Tools specially adapted for use in machines for manufacturing gear teeth
    • B23F21/12—Milling tools
    • B23F21/22—Face-mills for longitudinally-curved gear teeth
    • B23F21/223—Face-mills for longitudinally-curved gear teeth with inserted cutting elements
    • B23F21/226—Face-mills for longitudinally-curved gear teeth with inserted cutting elements in exchangeable arrangement
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T407/00—Cutters, for shaping
    • Y10T407/17—Gear cutting tool
    • Y10T407/1705—Face mill gear cutting tool
    • Y10T407/171—Adjustable teeth
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T407/00—Cutters, for shaping
    • Y10T407/24—Cutters, for shaping with chip breaker, guide or deflector
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T407/00—Cutters, for shaping
    • Y10T407/24—Cutters, for shaping with chip breaker, guide or deflector
    • Y10T407/245—Cutters, for shaping with chip breaker, guide or deflector comprising concave surface in cutting face of tool

Definitions

  • This invention relates to cutting tools useful for cutting slots in workpieces and is more particularly concerned with improved cutting tools for gear cutting applications.
  • V-shaped tools such as those seen in U.S.-A-3 354 525 (where moreover there may be problems with chips packing into the V-shaped part of the face) and, in a curved form in U.S.-A-3 820 211.
  • the cutting face of a tool has at least two planes with different rake angles which serve to maintain desired tool thickness while at the same time providing the requisite geometry for cutting certain types of materials.
  • the compound rake angles which are provided comprise two or more planar surfaces formed along the length of the cutting face of the tool. the first of these has a non-zero rake angle and the length of the cutting face of the tool. The form a cutting edge which contains a least part of the pressure angle portion.
  • the second of the planes has a rake angle different from the first (and may be zero) and intersects with the end portion of at at least part of a clearance angle portion as well as along an intermediate portion.
  • planar surfaces which are formed on the tools of this invention do not require re- sharpening at the time the tool is resharpened, and this permits the use of metallurgical or coating treatments on such surfaces for improving tool life and cutting action.
  • the surfaces can be formed very easily on tools at the time of original manufacture without a requirement for highly sophisticated equipment for such manufacture.
  • the cutting tool to which this invention relates is of the type which can be formed from bar stock having a rectangular cross-sectional configuration.
  • Each tool has a base end 10 and a cutting end 12.
  • the cutting end 12 includes a profile (as shown in Figure 2) for defining a clearance angle A and a pressure angle B.
  • an end angle C is formed at the cutting end of the tool.
  • Known tools of this type also include a built-in side rake angle D ( Figure 3) which can be formed by grinding off a front wall 13 of the tool for whatever length is desired.
  • Figure 4 illustrates a sidewall 25, a fillet 27, and a bottom portion 29 of a typical tooth slot that might be formed with the tools of this invention.
  • the cutting head 18 of the illustrated tool is defined by the intersection .of the cutting face 14 and the end of the tool that is ground off to develop the pressure angle B and the profile of the tool.
  • the cutting edge 18 is of the type designed to cut both the sidewall 25 ( Figure 4) and the bottom portion 29 of a tooth slot.
  • the full extent of the cutting edge 18 can be appreciated from the views of Figure 5 in which there is depicted a first part 20 of the cutting edge for cutting the side of a slot in a workpiece and an intermediate part 22 for cutting the bottom portion of a slot in a workpiece.
  • a radius 24 which provides a smooth profile for the development of the fillet 27 between the sidewall and bottom portion of a tooth slot in a workpiece.
  • the parts 20 and 22 are followed by a clearance angle portion, going to the clearance angle side of the tool.
  • FIG. 5 and 6 illustrates the possibility of having to place the intersection line 26 between a first plane 28 of the cutting face having a rake angle D and a second plane 30 having a zero rake angle in a position which passes through a portion of the cutting edge 18. This is necessary because of the relatively large pressure angle B required for the specific tool shown.
  • it is according to the invention preferable to place the line 26 between the part of the cutting edge cutting the sidewall and the part of the cutting edge cutting the bottom of the slot. Placement of the intersection line 26 between the bottom part 22 and the side part 20 of the tool cutting edge provides, in some applications, a desired chip control feature which tends to separate chips forming along the side, fillet and bottom portions of the tooth slot.
  • Figures 7 and 8 illustrate a variation of tool design having a first rake angle E and a second rake angle F. This is done to provide maximum clearance for chips across the face of the tool (towards its clearance angle side), and it may be preferred in certain applications to move the line 26 substantially toward the clearance angle side to avoid any unwanted chip "packing" in the cutting area of the tooth.
  • the angle E is 20 degrees while the angle F is 30 degrees, thereby providing a steeper side rake angle only for the part of the cutting edge that is cutting the bottom of the tooth slot.
  • planar surfaces may be placed at different angles than any of those shown (though the first plane 28 would not have a zero rake angle).
  • the illustrated tools show a cutting face 14 which is ground into the tool for less than the full length thereof, and this is to provide a substantial base portion 10 that can be secured and clamped in a cutterhead body, however, it is possible to extend the built-in rake angles along the entire length of the tool, if desired.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Milling Processes (AREA)
EP80901205A 1979-05-25 1980-12-15 Cutting tools having compound cutting faces Expired EP0028651B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/042,391 US4260299A (en) 1979-05-25 1979-05-25 Cutting tools having compound cutting faces
US42391 2002-01-11

Publications (3)

Publication Number Publication Date
EP0028651A1 EP0028651A1 (en) 1981-05-20
EP0028651A4 EP0028651A4 (en) 1981-10-27
EP0028651B1 true EP0028651B1 (en) 1983-12-07

Family

ID=21921675

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80901205A Expired EP0028651B1 (en) 1979-05-25 1980-12-15 Cutting tools having compound cutting faces

Country Status (6)

Country Link
US (1) US4260299A (enrdf_load_stackoverflow)
EP (1) EP0028651B1 (enrdf_load_stackoverflow)
JP (1) JPS6325059Y2 (enrdf_load_stackoverflow)
CA (1) CA1116838A (enrdf_load_stackoverflow)
DE (1) DE3065797D1 (enrdf_load_stackoverflow)
WO (1) WO1980002666A1 (enrdf_load_stackoverflow)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4525108A (en) * 1982-11-18 1985-06-25 The Gleason Works Cutter and method for gear manufacture
US4575285A (en) * 1984-11-19 1986-03-11 The Gleason Works Cutting tool and method of manufacture
US5374142A (en) * 1992-12-03 1994-12-20 Dana Corporation Tip relief cutter blades
US5305558A (en) * 1993-02-26 1994-04-26 The Gleason Works Method of sharpening profile-sharpened cutting blades
US5480343A (en) * 1993-02-26 1996-01-02 The Gleason Works Method of sharpening profile-sharpened cutting blades
CN1046648C (zh) * 1993-03-24 1999-11-24 格里森工场 万能切削刀坯和由此所形成的切削刀
DE19624685C1 (de) * 1996-06-20 1997-02-20 Oerlikon Geartec Ag Rundstabmesser und insbesondere dafür vorgesehener Messerkopf
JP2001092434A (ja) * 1999-09-21 2001-04-06 Sony Corp 情報処理装置、画像生成方法及びプログラム格納媒体
DE19958675A1 (de) * 1999-12-06 2001-06-07 Zahnradfabrik Friedrichshafen Profilwerkzeug
US20050268768A1 (en) * 2002-06-19 2005-12-08 Johnson David N Circular saw blade for cutting ferous materials
US8267624B2 (en) * 2005-06-27 2012-09-18 The Gleason Works Full point width cutting blades
US10040126B2 (en) * 2014-06-23 2018-08-07 Sumitomo Electric Hardmetal Corp. Cutting tool and method of manufacturing a cutting tool
CN106925846A (zh) * 2017-03-10 2017-07-07 江苏飞船股份有限公司 螺伞齿轮齿部切削刀具及其安装结构

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1820415A (en) * 1927-03-11 1931-08-25 Wildhaber Ernest Gear cutting tool
US1892091A (en) * 1930-03-06 1932-12-27 Wildhaber Ernest Cutting tool for generating noninvolute gears and gear shaped articles
US2838980A (en) * 1956-10-03 1958-06-17 Foote Burt Co Continuous broaching machines
US3354525A (en) * 1965-06-28 1967-11-28 Gleason Works Gear cutting tools and method of sharpening same
SU380404A1 (ru) * 1971-07-06 1973-05-15 Непрерывно-протяжной станок
US3757924A (en) * 1971-09-30 1973-09-11 Owens Illinois Inc Chain driven machinery
US3820211A (en) * 1973-01-22 1974-06-28 W Kus Tool bit
US4060881A (en) * 1976-11-15 1977-12-06 The Gleason Works Cutter head assembly for gear cutting machines
US4137001A (en) * 1977-05-02 1979-01-30 General Motors Corporation Cutter blade

Also Published As

Publication number Publication date
US4260299A (en) 1981-04-07
JPS56500003U (enrdf_load_stackoverflow) 1981-05-07
JPS6325059Y2 (enrdf_load_stackoverflow) 1988-07-08
DE3065797D1 (en) 1984-01-12
EP0028651A1 (en) 1981-05-20
WO1980002666A1 (en) 1980-12-11
EP0028651A4 (en) 1981-10-27
CA1116838A (en) 1982-01-26

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